Switch command line app server to netty

Author: shs96c

java/client/test/org/openqa/selenium/environment/BUILD.bazel

@@ -68,7 +68,7 @@ java_library(
 java_binary(
     name = "appserver",
     testonly = True,
-    main_class = "org.openqa.selenium.environment.webserver.JettyAppServer",
+    main_class = "org.openqa.selenium.environment.webserver.NettyAppServer",
     visibility = [
         "//:__pkg__",
         "//dotnet/test:__subpackages__",

java/client/test/org/openqa/selenium/environment/webserver/NettyAppServer.java

@@ -158,6 +158,6 @@ public static void main(String[] args) {
     NettyAppServer server = new NettyAppServer();
     server.start();
 
-    System.out.println(server.whereIs("/"));
+    System.out.printf("Server started. Root URL: %s%n", server.whereIs("/"));
   }
 }